MODIS

1. MODIS 1s uncertainty A43A-0224 AATS AOD above Lake Tahoe Overview Of Haze And Smoke Measurements in Northern High Latitudes And California During ARCTAS Using The NASA Ames Airborne Sunphotometer And Associated In Situ And Remote Sensors P. Russell1, J. Redemann2, J. Livingston3, Y. Shinozuka1,4, Q. Zhang2, S. Ramachandran5, R. Johnson1, A. Clarke6, S. Howell6, C. McNaughton6, B. Holben7, N. O'Neill8, B. Mcarthur9, E. Reid10, E. Hyer10, R. Ferrare11, C. Hostetler11, E. Eloranta13, R. Kahn7, L. Remer7, K. S. Schmidt12 1NASA Ames Research Center, Moffett Field, CA, 2B ay Area Environmental Research Institute, Sonoma, CA, 3SRI International, Menlo Park, CA, 4NASA Postdoctoral Program, ORAU, Oak Ridge, TN, USA. 5Physical Research Laboratory, Ahmedabad, INDIA, 6SOEST, University of Hawaii, Honolulu, HI, USA, 7NASA Goddard Space Flight Center, Greenbelt, MD, USA, 8CARTEL, Universite de Sherbrooke, Sherbrooke, QC, Canada, 9Environment Canada, Downsview, ON, Canada, 10Naval Research Laboratory, Monterey, CA, USA, 11NASA Langley Research Center, Hampton, VA, USA , 12LASP, University of Colorado, Boulder, CO, USA, 13SSEC, University of Wisconsin, WI, USA. P-3 time from MISR overpass MISR image MODIS CALIPSO DC-8 Flight Track Red – within 1 hr Yellow – within 2 hrs Green – within 3 hrs Blue – > 3 hrs Moffett Field OMI Ship YUEHE AATS/P-3B Flight Tracks During 2008 Arctic Research of the Composition of the Troposphere from Aircraft and Satellites (ARCTAS) Deployments Moss Landing Power Plant P-3B Flight Track F(l,z2) AOD(l, z2) • Summary and Conclusions • AATS data from the ARCTAS flights listed below are being used in a wide variety of studies of Arctic haze, surface properties, and biomass smoke, including satellite validation (Livingston et al., A43A-0154), closure tests between radiometric and in situ data products, multi-sensor determinations of aerosol properties and effects (Redemann et al., A41E-02; Ottaviani et al., A43A-0155), as well as studies of Cloud Condensation Nuclei (Shinozuka et al., A31G-07), High Spectral Resolution Lidar (Ferrare et al., A43A-0164), aerosol radiative heating (Bucholtz et al., A34B-01), and snow surface albedo (Schmidt et al., A43A-0159 ) and bidirectional reflectance (Lyapustin et al., A43A-0158). Example results presented in this poster include: • In 53 P-3 vertical profiles with altitude change >1 km, 66% of layer AODs from HiGEAR in situ scattering and absorption measurements were within ±(10%+0.02) of AATS layer AOD. • In 5 profiles over AERONET sites, AATS and AERONET AODs had RMS difference 0.017. • For AOD>0.1, AATS-HiGEAR Angstrom exponent (a) differences were typically <0.1. • As with a, the comparison of AATS Fine-Mode Fraction (FMF) to HiGEAR Submicron-Mode Fraction (SMF) showed little dependence on whether AATS-HiGEAR AOD difference was <(10%+0.02). a, FMF, & SMF are all intensive properties, perhaps less sensitive to plume horizontal structure that causes AOD differences. • Detailed results are shown in the presentations cited above and listed in References. Abstract The 14-channel NASA Ames Airborne Tracking Sunphotometer (AATS-14) operated in a suite of remote and in-situ sensors aboard the NASA P-3 aircraft during the 2008 Arctic Research of the Composition of the Troposphere from Aircraft and Satellites (ARCTAS) field campaign. Included were 7 Spring flights in the Arctic and 13 Summer flights (3 in California and 10 in Canada), each coordinated with one or more satellite overpasses, other aircraft (e.g., NASA B-200 and DC-8, NOAA P-3), and/or ground-based Aerosol Robotic Network (AERONET) measurements. This presentation gives an overview of AATS-14 aerosol optical depth (AOD) spectra and related parameters such as Angstrom exponent and fine mode fraction. We quantify the mutual consistency of AODs calculated from measurements by AATS-14, by the HiGEAR (University of Hawaii Group for Environmental Aerosol Research) suite of P-3 in-situ optical instruments, and by AERONET . The vertical integral of the HiGEAR in-situ scattering and absorption coefficients recorded during spiral profiles typically falls within ±(10% +0.02) of the AATS-14 AOD values interpolated to 450, 550 and 700 nm. Corresponding Angstrom exponents typically differ by ~0.1 if AOD>0.1. AATS-14 AODs adjusted for the contribution of the layer below the aircraft generally agree with the full column AERONET values to within the combined uncertainties. Example results from multiplatform comparisons are also shown. These results provide context for the more detailed AATS-14 results in other presentations, e.g., by Redemann et al. (focusing on the multi-platform, multi-sensor smoke case of 30 Jun 2008), Livingston et al. (comparisons to MODIS, MISR, OMI, POLDER, CALIPSO, and airborne lidar), and Shinozuka et al. (relationship to cloud condensation nuclei and other measurements). Summer—Boreal Forest Summer—California Spring—Arctic CAR circles Monterey Airport June 22, 2008 18:58 UT over Big Sur California 26 Jun Big Sur Fire F(l,z1) AOD(l, z1) 22 Jun AATS -14 NASA P-3B 24 Jun NASA P-3 8 Apr 30 Jun 22 Jun Multi-platform, multi-sensor coordination study of fire plume: P-3: AATS, SSFR, in situ; B-200: HSRL, RSP; A-train: MODIS-Aqua, CALIPSO, CERES 3-way comparison of Aerosol Optical Depth (AOD) from AATS, Hawaii Group for Environmental Aerosol Research (HiGEAR) in situ P-3, and Aerosol Robotic Network (AERONET) ground measurements, conducted in lidar beam at Eureka, 80 N, 86 W. 4-way comparison of AOD from AATS, HiGEAR in situ on P-3, AERONET ground measurements, and MODIS-Terra satellite conducted in spiral over Monterey Airport. See also Redemann et al., A41E-02 Right: Regression of radiative flux versus AOD yields radiative forcing efficiency A C B-200 Left: AOD comparison, AATS vs. MODIS (10-km standard retrieval, and 3-km experimental with cloud screening disabled) P-3 AATS AOD B CALIPSO Big Sur Fire Smoke 3 Jul 3-way comparison of AOD from AATS, HiGEAR in situ on P-3, and AERONET ground measurements, under Terra in regional biomass haze at Ft. McMurray. 24 Jun 26 Jun California wildfire smoke over Central Valley and Lake Tahoe in DC-8 lidar curtain below Terra. Potential radiation study using AATS, SSFR, CAR, HiGEAR, and Broad-Band Radiometers (BBR). Comparison of layer AOD below 5 km from AATS & HiGEAR in profile under MODIS-Aqua in California wildfire plume aloft. 15 Apr Radiation stack to determine aerosol absorption and single scattering albedo (SSA) by combining AATS and Solar Spectral Flux Radiometer (SSFR) data. See also Bierwirth et al. (A13A-0185), plus Schmidt et al. (A43A-0159) for surface albedo measurement and Lyapustin et al. (A43A-0158; ACPD, 2009) for snow Bidirectional Reflectance Factor (BRF) measurements. HiGEAR AOD (550 nm) = 0.29AATS14 AOD (550 nm) = 0.31 In biomass smoke plume predicted by NRL COAMPS and Goddard GEOS5, comparison of AOD and extinction vertical profiles from AATS and HiGEAR on P-3 with lidar profiles from HSRL on B-200 and CALIOP on CALIPSO. Comparison of AATS AOD with OMI and MODIS retrievals. 9 Jul Profile under Aqua Radiation Stack Overall AATS-HiGEAR-AERONET AOD Comparisons AATS-HiGEAR Angstrom and Size Comparisons AATS-HiGEAR comparison (below left) includes 53 vertical profiles with altitude change >1 km. 66% of HiGEAR layer AODs were within ±(10%+0.02) of AATS layer AOD. Exceptions are from layers with strong horizontal structure (e.g., smoke plumes). AATS-HiGEAR-AERONET comparisons include 5 profiles over AERONET sites (Barrow & Saturna Island below right; Pearl above; Monterey, middle column; Fort McMurray, right column). AATS and AERONET AODs had RMS difference 0.017 (76%<0.02, 61%<0.015). Comparison of AATS, OMI, and MODIS AOD spectra AATS-HiGEAR comparisons of Angstrom exponent a (above) show that for AOD>0.1, a differences were typically <0.1. As with a, the comparison (left) of AATS Fine-Mode Fraction (FMF) to HiGEAR Submicron-Mode Fraction (SMF) shows little dependence on whether AATS-HiGEAR AOD difference is <(10%+0.02). a, FMF, & SMF are all intensive properties, perhaps less sensitive to plume horizontal structure that causes AOD differences. Barrow, AK, 6 Apr References AATS +10%+0.02 Bierwirth, E., et al., Aerosol absorption coefficient and single scattering albedo from combined irradiance and actinic flux density measurements, AGU Fall 2009 Meeting, Paper A13A-0185, Poster Hall, 1:40-6:00 PM Mon 14 Dec 2009. Bucholtz, A., et al., Radiative Heating Rates of Canadian Boreal Forest Fire Smoke During ARCTAS, AGU Fall 2009 Meeting, Paper A13A-0185, Room 3004, 4:00 PM Wed 16 Dec 2009. Ferrare, R. A., et al., Airborne High Spectral Resolution Lidar Aerosol Measurements during ARCTAS, AGU Fall 2009 Meeting, Paper A43A-0164, Poster Hall, 1:40-6:00 PM Thur 17 Dec 2009.   Livingston, J. M. et al., Validation of satellite overland retrievals of AOD at northern high latitudes with coincident measurements from airborne sunphotometer, lidar, and in situ sensors during ARCTAS, Paper A43A-0154, Poster Hall, 1:40-6:00 PM Thur 17 Dec 2009. Lyapustin;, A., et al., Analysis of Snow BRF from Spring-2008 ARCTAS Campaign, AGU Fall 2009 Meeting, Paper A43A-0158, Poster Hall, 1:40-6:00 PM Thur 17 Dec 2009.   Lyapustin, A., et al., Analysis of snow bidirectional reflectance from ARCTAS spring-2008 campaign, Atmos. Chem. Phys. Discuss., 9, 21993–22040, 2009. O'Neill, N. T., et al. (2001), Modified Angstrom exponent for the characterization of submicrometer aerosols, Applied Optics, 40, 2368-2375. Markers sized by HiGEAR layer AOD550 nm See also Livingston et al., A43A-0154 AATS -10%-0.02 References (cont’d) Ottaviani , M., et al., The brightest side of ARCTAS: Using sunglint and polarization in retrievals of aerosol properties, AGU Fall 2009 Meeting, Paper A43A-0155, Poster Hall, 1:40-6:00 PM Thur 17 Dec 2009. Redemann, J. et al., The coordinated multi-sensor, multi-platform ARCTAS fire plume study on June 30, 2008, AGU Fall 2009 Meeting, AGU Fall 2009 Meeting, Paper A41E-02, Room 3004, 8:15 AM Thur 17 Dec 2009. Schmidt, S. , et al., Airborne Measurement of Surface Albedo in Alaska, AGU Fall 2009 Meeting, Paper A43A-0159, Poster Hall, 1:40-6:00 PM Thur 17 Dec 2009. Shinozuka, Y., et al., Challenges in remote sensing of CCN concentration: a comprehensive assessment with airborne measurements of AOD, CCN, chemical composition, size distribution, light scattering/absorption and humidity response in North America, AGU Fall 2009 Meeting, Paper A31G-07, Room 3004, 9:30 AM Wed 16 Dec 2009. Saturna Island off Vancouver, 7 Jul AATS FMF determined by method of O’Neil et al. See also Shinozuka et al., A31G-07